Zinc based metal–organic framework for nickel adsorption in water and wastewater samples by ultrasound assisteddispersive-micro solid phase extraction coupled to electrothermal atomic absorption spectrometry
Publish Year: 1399
نوع سند: مقاله ژورنالی
زبان: English
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شناسه ملی سند علمی:
JR_AMECJ-3-4_007
تاریخ نمایه سازی: 14 آذر 1402
Abstract:
In this research, Zn۲(BDC)۲(DABCO) metal–organic framework
(MOF) as a solid phase was used for separation and preconcentration
toxic nickel ions (Ni) from water samples by ultrasound assisteddispersive-
micro solid phase extraction coupled to electrothermal
atomic absorption spectrometry (USA-D-μ-SPE/ET-AAS).
The MOF nanostructure was characterized by field emissionscanning
electron microscope (FE-SEM) and transmission electron
microscopey (TEM) for presentation of morphology and size of MOF
synthesis. By procedure, ۲۵ mg of Zn۲(BDC)۲(DABCO) as MOF
adsorbent was added to ۲۵ mL of water samples and then, Ni ions
chemically adsorbed based on dative bonding of nitrogen in DABCO
(۱,۴-diazabicyclo [۲.۲. ۲]octane); N۲(C۲H۴)۳) at pH=۸. The adsorbent
was separated from liquid phase by syringe cellulose acetate filters
(SCAF, ۰.۲ μm) and Ni ions back extracted from MOF adsorbent
before determined by ET-AAS. The maximum recovery of MOF for
nickel ions as a physically and chemically adsorption was obtained
۳۴.۶% and ۹۸.۸% at pH=۳ and ۸, respectively. The capacity adsorption
of Zn۲(BDC)۲(DABCO), MOF for nickel was acquired ۱۲۵.۷ mg g-۱
at pH=۸. By procedure, the preconcentration factor (PF), LOD, and
linear range were achieved ۴۸.۷, ۰.۰۳ μg L−۱ and ۰.۱۰-۲.۸۸ μg L−۱,
respectively (RSD<۱.۲۶). The validation of proposed method was
successfully obtained by ICP- MS analysis in real samples.
Keywords:
Metal–organic framework , Nickel , Adsorption , Dispersive- micro solid phase extraction , Water sample , Electrothermal atomic absorption spectrometry
Authors
Negar Motakef Kazemi
Department of Medical Nanotechnology, Faculty of Advanced Sciences and Technology, Tehran Medical Sciences, Islamic Azad University, Tehran, Iran